The objective of the present study was to characterize the interrelationship between testicular and epididymis histomorphometrics during the pubertal development of D'Man lambs. The experimental subjects were lambs aged between two and five months. Each month, the lambs were slaughtered and their testes and epididymis removed, fixed and stained. The result showed significant changes in testicular histology. Spermatogenesis
starts between 3 and 5 months after birth. Seminiferous tubules, lumen and elongated spermatids were observed in 3- and 4-month-old animals. The tubular diameter of the corpus and the cauda epididymal tubules increased, respectively, from 2 to 4 months and from 2 to 5 months. The luminal diameter of the caput epididymal tubules exhibited a significant increase at the 3-month mark. A significant increase in the luminal diameter of the corpus and cauda epididymal tubules was observed at 3 and 4 months, respectively. The epithelial height of the caput and cauda epididymal tubules increased significantly at 5 months. The epithelial height of the corpus epididymal tubules increased significantly at 3 months. In conclusion, in D'Man lambs, the onset of puberty was observed at 3 months-old by the appearance of lumen in theseminiferous tubules.
Key words : Testis, Epididymis, histology, morphometry, D’Man lambs, puberty